000826230 001__ 826230 000826230 005__ 20250129094309.0 000826230 0247_ $$2doi$$a10.1002/fuce.201500167 000826230 0247_ $$2WOS$$aWOS:000382557300002 000826230 037__ $$aFZJ-2017-00476 000826230 041__ $$aEnglish 000826230 082__ $$a620 000826230 1001_ $$0P:(DE-Juel1)161508$$aKhaneft, Marina$$b0$$eCorresponding author$$ufzj 000826230 245__ $$aStructure and Proton Dynamics in Catalytic Layer of HT-PEFC 000826230 260__ $$aWeinheim$$bWiley-VCH$$c2016 000826230 3367_ $$2DRIVER$$aarticle 000826230 3367_ $$2DataCite$$aOutput Types/Journal article 000826230 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1487659028_15848 000826230 3367_ $$2BibTeX$$aARTICLE 000826230 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000826230 3367_ $$00$$2EndNote$$aJournal Article 000826230 520__ $$aThe present study focuses on structural and dynamical properties of the catalytic layer for high-temperature polymer electrolyte fuel cells (HT-PEFC). The catalytic layer is a composite material containing nanoporous carbon, poly(tetrafluoroethylene) (PTFE) and platinum (Pt) nanoparticles. The structure of the catalyst is investigated using small angle X-ray scattering (SAXS) following different preparation steps of the electrodes: pure carbon support, platinum/carbon (Pt/C) powder and finally, complete catalytic layer. The structural properties of the Pt/C powder containing different amounts of Pt are discussed along with the size distribution of Pt particles and their arrangement on the surface of the carbon support. Following the preparation sequence of the catalytic layer based on the Pt/C powders the electrodes with different final Pt loadings are analyzed in details. Investigation of the structure of the catalytic layer is accompanied by the study of nanosecond dynamics of the phosphoric acid (PA) in the catalytic layer containing different amount of Pt by means of neutron backscattering spectroscopy. The structure of the catalytic layer is mostly determined by the structure of the catalytic powder and does not vary significantly with Pt loading in the electrode. 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